Phase 2: Determine the destination of the candidate system

The second phase of the discovery process, shown in Phase 2: Determining the destination of a candidate system, determines the destination of a discovery candidate system:

Add to topology
Place on the Pending Devices list
Discard

Figure 1. Phase 2: Determining the destination of a candidate system

As shown in Phase 2: Determining the destination of a candidate system, the destination of the candidate system depends on many factors, including:
Whether the candidate system is an autodiscovery or manual candidate system
Whether the system passes ICMP or SNMP polling
Whether the system matches a discovery filter
Whether the current system limit is exceeded
Whether any volume licenses are available
Whether ShowPendingNONSNMP in the BASEDIR/smarts/conf/discovery/discovery.conf file is set to TRUE

Factors that affect the destination of a candidate system summarizes how these factors determine the destination of a candidate system when sufficient volume licenses are available.

Table 1. Factors that affect the destination of a candidate system
Candidate system	Initial polling		Match filter	Current system limit exceeded 1	ShowPendingNONSNMP	Destination
Candidate system	ICMP	SNMP	Match filter	Current system limit exceeded 1	ShowPendingNONSNMP	Destination
Autodiscovery	Passed	Passed	Yes	No	Not applicable	Topology
			Yes	Yes	Not applicable	Pending Devices list
			No	Not applicable	Not applicable	Discard
		Failed	Not applicable	Not applicable	TRUE	Pending Devices list
		Failed	Not applicable	Not applicable	FALSE (default)	Discard
	Failed	Not applicable	Not applicable	Not applicable	Not applicable	Discard
Manual Discovery	Passed	Passed	Not applicable	No	Not applicable	Topology
		Passed	Not applicable	Yes	Not applicable	Pending Devices list
		Failed	Not applicable	Not applicable	Not applicable	Pending Devices list
	Failed	Not applicable	Not applicable	Not applicable	Not applicable	Pending Devices list
1 50 by default. The IP Manager User Guide provides information on how to change the default.

The “Match filter” column in the table pertains to the matching of discovery-filter criteria other than “IP address.” An autodiscovery candidate system is subjected to two levels of discovery-filter matching: initially, a matching of IP address, and then a matching of other criteria after the candidate system passes ICMP or SNMP polling. The two levels of discovery-filter matching are described in IP Manager User Guide.

If a candidate system cannot be discovered and is not discarded, the IP Manager places the system on the Pending Devices list. The Pending Devices list is described in “Pending Devices list” on page 193.